This manual covers the Fiat 90 Series Tractors, including models 115-90, 130-90, 140-90, 160-90, and 180-90, primarily produced during the 1980s and 1990s. These heavy-duty agricultural tractors are recognized for their robust construction and reliability, serving as a cornerstone for Fiat-Agri. Featuring powerful Fiat/Iveco diesel engines and durable transmission systems, the 90 Series was engineered for demanding farm work, offering a range of horsepower options to suit various agricultural needs. Their design emphasizes straightforward operation and long-term serviceability, making them a dependable choice for agricultural operations. This comprehensive workshop manual provides detailed information for the maintenance, repair, and troubleshooting of your Fiat 90 Series tractor. It covers all major systems, including the engine, transmission, hydraulics, electrical, braking, and steering. Within its 507 pages, you will find step-by-step repair procedures, diagnostic guides, technical specifications, and essential maintenance schedules. This manual is an indispensable resource for owners, mechanics, and technicians seeking to ensure optimal performance, reduce downtime, and maintain the longevity of their Fiat 90 Series tractor.